The Donner version of Superman 2 has my favorite version of Lois testing Superman. She gives him the usual speech, "I know you're Superman," and Clark goes, "Well, gee, umm, golly, gosh, I'm not Superman, Lois." Then she pulls a gun on him. "I'm so sure you're Superman," she says, "I'm going to prove it." And she shoots at him. Clark flinches dramatically, pauses a beat, then stands up straight, takes off his glasses, and says in Superman's baritone, "That was very foolish, Lois. You could have been hurt by a ricochet." She gives him a shit-eating grin and tells him the gun was loaded with blanks.